Update commitizen to the latest version 🚀

[greenkeeper[bot]]

The devDependency commitizen was updated from 3.1.2 to 4.0.0.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

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Publisher: commitizen-bot License: MIT

Release Notes for v4.0.0

4.0.0 (2019-07-18)

Bug Fixes

• node: remove node 6 and 8 support (#649) (8931c6b)

BREAKING CHANGES

• node: Removal of two major node versions, 6 and 8 from testing scheme

Commits

The new version differs by 2 commits.

• 8931c6b fix(node): remove node 6 and 8 support (#649)
• ad6f14c chore(deps): update dependency semantic-release to v15.13.18 (#644)

See the full diff

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FAQ and help

There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html). If those don’t help, you can always [ask the humans behind Greenkeeper](https://github.com/greenkeeperio/greenkeeper/issues/new).

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Your Greenkeeper bot :palm_tree:

[coveralls]

Pull Request Test Coverage Report for Build 88

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 70.982%

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Totals
Change from base Build 68:	0.0%
Covered Lines:	144
Relevant Lines:	198

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💛 - Coveralls

[greenkeeper[bot]]

• The devDependency commitizen was updated from 3.1.2 to 4.0.1.

Update to this version instead 🚀

Release Notes for v4.0.1

4.0.1 (2019-07-19)

Bug Fixes

• dep updates (#650) (c48bfb4)

Commits

The new version differs by 1 commits.

• c48bfb4 fix: dep updates (#650)

See the full diff

[greenkeeper[bot]]

• The devDependency commitizen was updated from 3.1.2 to 4.0.2.

Update to this version instead 🚀

[greenkeeper[bot]]

• The devDependency commitizen was updated from 3.1.2 to 4.0.3.

Update to this version instead 🚀